S4C
Guto Gwningen
– 10:20
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S4C ·
– 08:40 UK time
Mae Guto Gwningen a'i ffrindiau'n trio darganfod beth yw dyfais newydd tad Benja, Mr Sponcen. Guto Gwningen and his friends try to find out what Benja's dad's invention is used for.